<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>质感方块</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        body{
            height: 100vh;
            overflow: hidden;
            display: flex;
            justify-content: center;
            align-items: center;
            background-color: #acbaca;
        }
        div{
            width: 300px;
            height: 300px;
            background-color: #c9d5e0;
            border-radius: 50px;
            box-shadow: 30px 30px 30px -10px rgba(0,0,0,.15),
            inset 12px 12px 10px rgba(255,255,255,.5),
            -15px -15px 35px rgba(255,255,255,.4),
            inset -1px -1px 10px rgba(0,0,0,.2);
        }
    </style>
</head>
<body>
    <div></div>
</body>
</html>